Selective detection of methane in domestic environments using a catalyst sensor system based on Ga2O3

G. K. Flingelli, M. M. Fleischer, H. Meixner

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Using high temperature operated Ga2O3 thin films, attempts have been made to realize sensors for methane detection with high stability and reproducibility and quick response. Yet these sensors show high cross sensitivities to ethanol (300 ppm) and other organic solvents that distinctly exceed the measurement effect towards methane (0.5%). Using a thin film Ga2O3-gas sensor which is equipped with a catalytic-preoxidation-filter of porous Ga2O3 and operated at temperatures of 800°C, the cross sensitivities are eliminated. The organic solvents are oxidised while passing the filter and only the quite stable methane is allowed to reach the sensor surface. Selective CH4 detection is possible, even in the (simultaneous) presence of 300 ppm ethanol.

Original languageEnglish
Pages (from-to)258-262
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume48
Issue number1-3
DOIs
Publication statusPublished - May 30 1998

Keywords

  • Catalytic sensor
  • GaO thin film
  • Methane detection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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